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Method for operating a supply unit for a driver circuit, and supply unit for a driver circuit

A technology for driving circuits and power supply units, applied in electrical components, emergency protection circuit devices, adjusting electrical variables, etc., can solve the problems that power electronic circuits cannot be designed for single-fault safety

Active Publication Date: 2008-12-10
BECKHOFF AUTOMATION GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With such a mechanical switching relay, power electronic circuits cannot be designed to be single-fault safe

Method used

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  • Method for operating a supply unit for a driver circuit, and supply unit for a driver circuit
  • Method for operating a supply unit for a driver circuit, and supply unit for a driver circuit
  • Method for operating a supply unit for a driver circuit, and supply unit for a driver circuit

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Embodiment Construction

[0033] FIG. 1 shows a block diagram for starting an electric machine in a drive system. In a control system 1, starting values ​​are generated, wherein an electric machine 2 is to be started according to said starting values. The starting of the electric machine 2 is usually carried out by means of a power electronics circuit 3 which includes a power stage 4 . In the illustrated embodiment, said power stage 4 generates three phase currents and for this purpose generally has six electronic switches (not shown in the figure), which are controlled by corresponding switches from a drive circuit 5 Signal starts. The electric machine 2 described is advantageously of synchronous or asynchronous construction, in particular of a construction which can be operated with an electric rotating field and which has no commutation means of its own.

[0034] Said power stage 4 is used to supply the rotating field with the current strength necessary to operate the electric machine 2 . The swi...

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PUM

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Abstract

A power supply and method of operating the same. The method includes the steps of: operating first and second switches to an “On” position; operating said first switch to a “Off” position, causing a flow of a first free-wheeling current through a first free-wheeling current path; measuring a value of said free-wheeling current; controlling the switching of said second switch responsive to said value of said free-wheeling current; and regulating power from said power supply unit. The power supply includes: an inductive converter; a first free-wheeling current path comprising: a first switch connected in series with said inductive converter and a first means for measuring a first free-wheeling current flowing through said first free-wheeling current path; and a second free-wheeling current path comprising: a second switch connected in series with said inductive converter and a second means for measuring a second free-wheeling current flowing through said second free-wheeling current path.

Description

technical field [0001] The invention relates to a method for operating a drive circuit of a power stage, in particular a power supply unit for a power circuit of an electric motor. The invention also relates to a power supply unit for supplying electric power in a drive circuit of a power stage. Background technique [0002] Electric drive units generally comprise an electric machine and a power electronics circuit which takes energy from a supply network with a fixed frequency and voltage and converts this energy to generate a rotating magnetic field in the electric machine. The rotational speed and torque of the electric machine are regulated through the above-mentioned power electronic circuit. The power electronics usually includes a servo transformer or, in the case of an unregulated drive system, a frequency converter. Servo transformers and frequency converters are often collectively referred to as inverters and are activated via a drive circuit provided in the powe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/00H02H7/08H02M3/335H03M3/00
CPCH02H7/0844H02M3/335
Inventor U·普吕斯迈尔J·萨赫斯
Owner BECKHOFF AUTOMATION GMBH